Changes in the flotation kinetic of bituminous coal before and after natural weathering processes
Wencheng Xia 1  
,   Yaoli Peng 1,   Chuancheng Ren 2,   Guangyuan Xie 1,   Chuan Liang 3
 
More details
Hide details
1
China University of Mining and Technology
2
Dezhou University
3
Shandong Energy Linyi Mining Group Co., Ltd., Linyi 276017, Shandong, China
CORRESPONDING AUTHOR
Wencheng Xia   

China University of Mining and Technology, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221, 221116 Xuzhou, China
Publication date: 2015-03-26
 
Physicochem. Probl. Miner. Process. 2015;51(2):401–410
 
KEYWORDS
TOPICS
ABSTRACT
Natural weathering processes can make coal surface more hydrophilic since the increase of content of hydrophilic functional groups (C-O, C=O and COOH) and the decrease of content of hydrophobic functional groups (C-C and C-H) on coal surface, and hence the flotation recovery of fine coal is reduced. In this paper, bituminous coal was used as coal samples and XPS was used to indicate the changes in surface properties of bituminous coal before and after natural weathering processes. A series of flotation tests were conducted in order to investigate the changes in the flotation kinetic of bituminous coal before and after natural weathering processes. Throughout this paper, the flotation kinetic was found to be changed. The classical first-order rate constant (k) of bituminous coal flotation was reduced after natural weathering processes. The relationship between the classical first-order rate constant (k) and the hydrophilicity ability (HA) was given.
eISSN:2084-4735
ISSN:1643-1049